* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -moz-box-sizing: border-box; /* Firefox */
    -webkit-box-sizing: border-box; /* Safari */
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

body {
    font-size: 14px;
    font-family: '微软雅黑', Microsoft YaHei, '宋体', Tahoma, Helvetica, Arial, sans-serif;
}

ul li {
    list-style: none;
}

a:link, a:visited, a:hover, a:active {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

img {
    border-style: none;
}

.R {
    float: right;
}

.L {
    float: left;
}

.clearfix:after {
    content: ".";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}

/*弹性盒子*/
.flex {
    display: flex;
}

.flex-item {
    flex: 1;
}
.placeholder {
    color: #757575;
}
